洋葱种子价格多年来一直居高不下 ,原因有三 :其一 ,生产种多以成株繁种 ,虽产量较高 ,但占地时间长 ,费工费时 ,生产成本高 ,风险较大 ;第二 ,半成株繁种在生产上很少运用 ,同时也存在费工费时 ,生产成本仍较高的缺点 ;第三 ,小株繁种产量低且不稳定 ,无法满足市场的需求。从 Onion seed prices have been high for many years, for three reasons: First, the production of species to plant more species, although the higher yield, but covers a long time, labor-intensive time-consuming, high production costs, the risk is greater; second , Semi-finished products rarely used in production, but also there is the shortcomings of time-consuming, cost of production is still high; third, small plant output is low and unstable, unable to meet the needs of the market. From